<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcss.com/vue/2.4.2/vue.js"></script>
</head>
<body>
<div id="app">
    <p v-show="show">显示C</p>
</div>
<script>
    new Vue({
        el : "#app",
        data : {
            show : true
        }
    })
</script>
</body>
</html>